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Finding the Fourth Proportional to 438,312.70, 657,490.65 and 228,360.70

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Solution

The fourth proportional to 438,312.70, 657,490.65 and 228,360.70 is: 342,552.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,312.70 : 657,490.65 = 228,360.70 : x
  2. Step 2: Convert to fraction form
    438,312.70/657,490.65 = 228,360.70/x
  3. Step 3: Cross multiply
    438,312.70x = 657,490.65 × 228,360.70
  4. Step 4: Simplify right side
    438,312.70x = 150,145,025,077.46
  5. Step 5: Solve for x
    x = 150,145,025,077.46/438,312.70
  6. Step 6: Final answer
    x = 342,552.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.