Home / 712,420.23-983,110.40-390,124.77

Finding the Fourth Proportional to 712,420.23, 983,110.40 and 390,124.77

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Solution

The fourth proportional to 712,420.23, 983,110.40 and 390,124.77 is: 538,356.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,420.23 : 983,110.40 = 390,124.77 : x
  2. Step 2: Convert to fraction form
    712,420.23/983,110.40 = 390,124.77/x
  3. Step 3: Cross multiply
    712,420.23x = 983,110.40 × 390,124.77
  4. Step 4: Simplify right side
    712,420.23x = 383,535,716,733.98
  5. Step 5: Solve for x
    x = 383,535,716,733.98/712,420.23
  6. Step 6: Final answer
    x = 538,356.02

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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.