Home / 712,328.10-983,012.65-390,038.14

Finding the Fourth Proportional to 712,328.10, 983,012.65 and 390,038.14

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Solution

The fourth proportional to 712,328.10, 983,012.65 and 390,038.14 is: 538,252.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,328.10 : 983,012.65 = 390,038.14 : x
  2. Step 2: Convert to fraction form
    712,328.10/983,012.65 = 390,038.14/x
  3. Step 3: Cross multiply
    712,328.10x = 983,012.65 × 390,038.14
  4. Step 4: Simplify right side
    712,328.10x = 383,412,425,602.47
  5. Step 5: Solve for x
    x = 383,412,425,602.47/712,328.10
  6. Step 6: Final answer
    x = 538,252.56

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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.