Home / 712,681.13-983,500.18-390,402.79

Finding the Fourth Proportional to 712,681.13, 983,500.18 and 390,402.79

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Solution

The fourth proportional to 712,681.13, 983,500.18 and 390,402.79 is: 538,755.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,681.13 : 983,500.18 = 390,402.79 : x
  2. Step 2: Convert to fraction form
    712,681.13/983,500.18 = 390,402.79/x
  3. Step 3: Cross multiply
    712,681.13x = 983,500.18 × 390,402.79
  4. Step 4: Simplify right side
    712,681.13x = 383,961,210,802.75
  5. Step 5: Solve for x
    x = 383,961,210,802.75/712,681.13
  6. Step 6: Final answer
    x = 538,755.96

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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.