Home / 712,710.76-983,541.10-390,432.46

Finding the Fourth Proportional to 712,710.76, 983,541.10 and 390,432.46

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Solution

The fourth proportional to 712,710.76, 983,541.10 and 390,432.46 is: 538,796.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,710.76 : 983,541.10 = 390,432.46 : x
  2. Step 2: Convert to fraction form
    712,710.76/983,541.10 = 390,432.46/x
  3. Step 3: Cross multiply
    712,710.76x = 983,541.10 × 390,432.46
  4. Step 4: Simplify right side
    712,710.76x = 384,006,371,184.11
  5. Step 5: Solve for x
    x = 384,006,371,184.11/712,710.76
  6. Step 6: Final answer
    x = 538,796.93

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.