Home / 712,985.14-983,904.06-390,688.30

Finding the Fourth Proportional to 712,985.14, 983,904.06 and 390,688.30

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Solution

The fourth proportional to 712,985.14, 983,904.06 and 390,688.30 is: 539,141.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,985.14 : 983,904.06 = 390,688.30 : x
  2. Step 2: Convert to fraction form
    712,985.14/983,904.06 = 390,688.30/x
  3. Step 3: Cross multiply
    712,985.14x = 983,904.06 × 390,688.30
  4. Step 4: Simplify right side
    712,985.14x = 384,399,804,564.50
  5. Step 5: Solve for x
    x = 384,399,804,564.50/712,985.14
  6. Step 6: Final answer
    x = 539,141.40

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Double scale
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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.