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Finding the Fourth Proportional to 612,047.40, 918,071.10 and 521,505.60

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Solution

The fourth proportional to 612,047.40, 918,071.10 and 521,505.60 is: 782,258.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,047.40 : 918,071.10 = 521,505.60 : x
  2. Step 2: Convert to fraction form
    612,047.40/918,071.10 = 521,505.60/x
  3. Step 3: Cross multiply
    612,047.40x = 918,071.10 × 521,505.60
  4. Step 4: Simplify right side
    612,047.40x = 478,779,219,848.16
  5. Step 5: Solve for x
    x = 478,779,219,848.16/612,047.40
  6. Step 6: Final answer
    x = 782,258.40

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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.