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Finding the Fourth Proportional to 292,278.40, 438,417.60 and 212,574.40

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Solution

The fourth proportional to 292,278.40, 438,417.60 and 212,574.40 is: 318,861.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,278.40 : 438,417.60 = 212,574.40 : x
  2. Step 2: Convert to fraction form
    292,278.40/438,417.60 = 212,574.40/x
  3. Step 3: Cross multiply
    292,278.40x = 438,417.60 × 212,574.40
  4. Step 4: Simplify right side
    292,278.40x = 93,196,358,269.44
  5. Step 5: Solve for x
    x = 93,196,358,269.44/292,278.40
  6. Step 6: Final answer
    x = 318,861.60

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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.