Home / 280,495,280.40-420,742,920.60-127,440,272.40

Finding the Fourth Proportional to 280,495,280.40, 420,742,920.60 and 127,440,272.40

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Solution

The fourth proportional to 280,495,280.40, 420,742,920.60 and 127,440,272.40 is: 191,160,408.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,495,280.40 : 420,742,920.60 = 127,440,272.40 : x
  2. Step 2: Convert to fraction form
    280,495,280.40/420,742,920.60 = 127,440,272.40/x
  3. Step 3: Cross multiply
    280,495,280.40x = 420,742,920.60 × 127,440,272.40
  4. Step 4: Simplify right side
    280,495,280.40x = 53,619,592,411,635,576
  5. Step 5: Solve for x
    x = 53,619,592,411,635,576/280,495,280.40
  6. Step 6: Final answer
    x = 191,160,408.60

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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.