Home / 712,715.20-983,547.30-390,436.96

Finding the Fourth Proportional to 712,715.20, 983,547.30 and 390,436.96

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Solution

The fourth proportional to 712,715.20, 983,547.30 and 390,436.96 is: 538,803.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,715.20 : 983,547.30 = 390,436.96 : x
  2. Step 2: Convert to fraction form
    712,715.20/983,547.30 = 390,436.96/x
  3. Step 3: Cross multiply
    712,715.20x = 983,547.30 × 390,436.96
  4. Step 4: Simplify right side
    712,715.20x = 384,013,217,828.21
  5. Step 5: Solve for x
    x = 384,013,217,828.21/712,715.20
  6. Step 6: Final answer
    x = 538,803.18

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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.