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Finding the Fourth Proportional to 287,802.60, 431,703.90 and 228,316.20

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Solution

The fourth proportional to 287,802.60, 431,703.90 and 228,316.20 is: 342,474.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,802.60 : 431,703.90 = 228,316.20 : x
  2. Step 2: Convert to fraction form
    287,802.60/431,703.90 = 228,316.20/x
  3. Step 3: Cross multiply
    287,802.60x = 431,703.90 × 228,316.20
  4. Step 4: Simplify right side
    287,802.60x = 98,564,993,973.18
  5. Step 5: Solve for x
    x = 98,564,993,973.18/287,802.60
  6. Step 6: Final answer
    x = 342,474.30

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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.